NAVY MIL-E-19603 C-1974 ENAMEL BAKING FOR ROLLER COAT APPLICATION《辊涂应用烘烤搪瓷》.pdf

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1、I MIL-E-1 9603C . 31 July 1974 SUPERSEDING 25 September 1958 MIL-E-19603B MILITARY SPECIFICATION . , ENAMEL, BAKING, FOR ROLLER COAT APPLICATION This specification is approved for use for all departments and agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers two cla

2、sses of enamel for roller application over a size coat on metal containers. (See 6.1 .) This specification meets Air Pollution Regulations (Rule 66). 1.2 Classification. Roller coat enamel shall be of the following classes, as specified (see 6.2). Class 1 Gloss Class 2 Semigloss 2. APPLICABLE DOCUME

3、NTS 2.1 The following documents of the issues in effect on date of invitation for bids or request for proposals form a part of this specification to the extent specified herein. SPECIFICATION Federal . QQ-T425 TT-P- 143 Tin Plate (Hot Dip and Electrolytic) Paint, Varnish, Lacquer and Related Materia

4、ls; General Specification for Packaging, Packing and Marking Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-LSb03C 0 W 77777Ob OL0267b 2 W MIL-E-19603C . Military MIL-P-19602 STANDARDS Federal FED-STD- 14 1 FED-STD-5 95 Military Primer, Size C

5、oating, Baking, for Roller Coat Appli- cation Paint, Varnish, Lacquer, and Related Materials; Methods of Inspection, Sampling and Testing Colors MIL-STD-129 Marking for Shipment and Storage (Copies of specifications and standards required by contractors in connection with specific procurement functi

6、ons should be obtained from the procuring activity or as directed by the contracting officer.) 2.2 Other publications. The following document forms a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on the date of invitation for bids or reque

7、st for proposal shall apply. American Society for Testing and Materials J ASTM D476 Specifications for Titanium Dioxide Pigments (Applications for copies should be addressed to the American Society for Testing and Materials. 19 16 Race Street. Philadelphia. Pennsylvania 19 103 .) 3. REQUIREMENTS 3.1

8、 Color. The enamel shall be furnished in the FED-STD-595 color number specified in the contract or purchase order (see 6.2). When tested as in 4.4.3 it shall acceptably match standard color chip FED-STD-595 except the gloss of color standards 2623 1 and 25 109 shall be disregarded when matching the

9、gloss enamel colors of blue-gray and medium blue. 2 : - r_ -. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-17603C 80 m 7777706 0302677 Li m MIL-E-19603C 3.2 Composition. 3.2.1 Pigments. Any combination of the pigments listed in table I for a

10、ny specific color shall make up the basic hiding pigmentation for that color. Hiding pigments shall be chemically pure and free from extenders. The titanium dioxide shall be rutile chalk resisting type conforming to types III or IV of ASTM D 476. Small amounts of other shading pigments may be used w

11、hen necessary to match the color chips provided these additional pigements have good color permanence. Extender pigments for the semigloss enamels are permitted. Based on total pigment weight, the extenders shall not exceed 75 percent for black, 55 percent for blue-gray and medium blue and 48 percen

12、t for olive drab. The extender pigments shall be siliceous matter and barytes. Table I PIGMENTATION FED-STD-595 Colo; No. 17038 27038 14087 24087 2623 1 - 25 109 Color Black Olive Drab Blue-Gra y Medium Blue Pigmentation Carbon black, lampblack Yellow iron oxide, red iron oxide, carbon black, lampbl

13、ack, chrome yellow, phtalocyanine blue, titanium dioxide. Yellow iron oxide, red iron oxide, carbon black, lampblack, chrome yellow, phtalocyanine blue, titanium dioxide. Iron blue, lampblack, yellow iron oxide, titanium dioxide. 3.2.2 Vehicle. The vehicle for the enamel shall be an epoxy varnish or

14、 a vinyl resin solution. Small amounts of other resins or film formers may be used to impart desired film characteristics. The vehicle shall give a negative test for rosin and rosin derivatives (see 4.4.2). 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I

15、HS-,-,-flIL-E-17603C 80 777770b 0302678 b MIL-E-19603C 3.2.3 Volatile content. The volatile content shall conform to the following requirements by volume when tested as in 4.4.4. a. Solvents having an olefinic or cyclo-olefinic type of unsaturation: 5 percent maximum. b. A combination of aromatic co

16、mpounds with eight or more carbon atoms to the molecule except ethyl benzene: 8 percent maximum. c. A combination of ethyl benzene, ketones having branched hydrocarbon structures, or toluene: 20 percent maximum. d. Total of a + b + c: 20 percent maximum. 3.3 Quantitative requirements. The enamel sha

17、ll, conform to the quantitative requirements specified in table II. Table II QUANTITATIVE REQUIREMENTS Characteris tics Fineness of grind Coarse particles and skins retained on a No. 325 sieve, percent by weight of enamel Specular gloss, 60“ Class 1 Class 2 Minimum 6 - 65 30 Maximum - 0.5 - 50 3.4 Q

18、ualitative requirements. ._ 3.4.1 Condition in container. When tested as in 4.4.6 the enamel shall show little or no settling in the freshly opened package and shall mix readily to a smooth homogeneous state. It shall show no evidence of livering or curdling and shall be free from skins and lumps. 4

19、 =-. I, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-L7603C 0 = 7777706 0302677 MIL-E-19603C 3.4.2 Application. When tested as in 4.4.7 the enamel shall produce uniform films of 6 to 12 milligrams per square inch dry coating weight (see 6.5)

20、. 3.4.3 Baking schedule. The manufacturer shall provide the baking schedule; however, it shall not exceed 10 minutes at 400“ F (metal temperature). 3.4.4 Coating system. Panels prepared as in 4.4.8 shall show no lifting of the size coat. 3.4.5 Blocking. When tested as in 4.4.9 none of the enamel sha

21、ll separate from the coated surface and adhere to or be retained on the uncoated surfaces. A slight tendency of the specimens to stick together will be permissible. 3.4.6 Flexibility. When tested as in 4.4.10 the coating system shall not crack, flake or show loss of adhesion at the bend. In addition

22、 it shall be capable of withstanding all forming operations normally employed in fabricating containers without showing evidence of any type of film failure. 3.4.7 Knife test. When tested as in 4.4.1 1 the coating system shall adhere tightly to the metal and shall show good adhesion between the size

23、 coat and the enamel. The film shall not chip or flake from the metal. 3.4.8 Accelerated weathering. When tested as in 4.4.12 the coating system shall show no more than slight chalking (photo no. 8 method 641 1 of FED-STD-141) and a color change equivalent to a lightness index difference not exceedi

24、ng three units. 3.4.9 Salt spray resistance. When tested as in 4.4.13 the coating system shall show no rust creepage or undercutting beyond one-sixteenth inch from the score mark. At all other. points there shall be no rusting or blistering. Upon removal of the coating system the metal substrate sha

25、ll be free from rusting, pitting, or corrosion except on the area immediately adjacent to the score. 3.4.1 O Toxicity. The enamel shall contain no benzene (benzol), methanol, chlorinated compounds, hydrolyzable chlorine derivatives, or other ingredients which are deemed toxicologically hazardous und

26、er normal conditions of usage. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the perf

27、ormance of all inspection requirements as specified herein. Except as otherwise Specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government

28、reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 Sampling, inspection and testing. Unless otherwise specified, sampling, inspection and testing shall

29、 be in accordance with method 103 1 of FED-STD-141. 4.3 Classification of tests. Testing under this specification shall be for the purpose of acceptance of individual lots. 4.4 Test methods. 4.4.1 Test conditions. The routine and referee testing conditions shall be in accordance with section 7, FED-

30、STD-141 except as otherwise specified herein. 4.4.2 The following tests of table III shall be conducted in accordance with applicable methods of FED-STD-141 or as required in this specification. The right is reserved to make any additional tests deemed necessary to determine that the roller coat ena

31、mel meets the requirements of this specification. 4.4.3 Color. In accordance with method 4250 of FED-STD-141 compare the specified color chip of FED-STD-595 with the pigmented coating as prepared in 4.4.8 for compliance with 3.1. 4.4.4 Volatile content. Determine solvents as in methods 7355 and 7356

32、 of FED-STD-14 1 for compliance with 3.2.3. 4.4.5 Specular gloss, 60“. Using a panel prepared as in 4.4.8 measure the gloss as specified in method 6101 of FED-STD-141 for compliance with table II. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL

33、-E-19603C Table III INDEX Tests Color Rosin and rosin derivatives in isolated vehicle Volatile content Fineness of grind Coarse particle and skins retained on a 325 mesh screen Specular gloss, 60“ Condition in container Application Baking schedule Coating system (Preparation of test panels) Blocking

34、 Flexibility Knife test Accelerated weathering Salt spray resistance Toxicity Applicable method in FED-STD- 14 1 4250 503 1 7355,7356 441 1 4092 6101 301 1 - - - 6216 6221 6304 61 52 606 1 - Paragraph of this specifica- tion giving fur- ther references Paragraph of tion specifica- tion giving requir

35、ements 4.4.3 4.4.4 - - - 4.4.5 4.4.6 4.4.7 4.4.8 4.4.9 4.4.1 O 4.4.1 1 4.4.12 4.4.13 4.4.14 - 3.1 3.2.2 3.2.3 Table II Table II Table II 3.4.1 3.4.2 3.4.3 3.4.4 3.4.5 3.4.6 3.4.7 3.4.8 3.4.9 3.4.10 4.4.6 Condition in container. Determine package condition in accordance with method 301 1 of FED-STD-1

36、41 and observe fclr compliance with 3.4.1. 4.4.7 Application. Cut a 4- by 4-inch section from each of three size coated panels which have been baked. Weigh the specimens and then remove the film either cathodically or by the use of a solvent. Re-weigh and by difference calculate the average coating

37、weight per square inch. Reduce the enamel for roller coat application in accordance with the manufacturers recommendation and apply the enamel to three size coated panels of known coating weight. Bake, then follow the procedure outlined above to determine the coating weight of the combined system (s

38、ize plus gloss enamel). By difference determine the weight of the enamel (weight of the system coated panel minus the weight of the stripped panel minus the weight of the size coat equals the weight of the gloss enamel). Check for compliance with 3.4.2. 7 Provided by IHSNot for ResaleNo reproduction

39、 or networking permitted without license from IHS-,-,-NIL-E-LSb03C AO m 779770b OLO2b2 m MIL-E-1 9603C - 4.4.8 Preparation of test panels. Apply a size coat conforming to MIL-P-19602 (see 6.6) to a dry film weight of 1 to 3 milligrams per square inch to ten (1 O) 4- by 8-inch tin panels conforming t

40、o QQ-T-425 grade 4, class 25 with bright finish. Bake according to the manufacturers recommended schedule. Using eight of the sized panels apply the roller coating enamel to a dry film weight of 6 to 12 milligrams per square inch (see 4.4.7). Bake according to the manufacturers recommendation and us

41、e the panels where applicable in the subsequent tests. 4.4.9 Blocking, Cut six 2- by 2-inch specimens from panels prepared as in 4.4.8. Stack the specimens so that the coated surface of the one below is in contact with the uncoated surface of the one directly above. Place the stacked specimens in an

42、 oven for 24 hours at 120“ f 2“ F. with a weight sufficient to exert 10 Ib per square inch resting on them. Cool to room temperature and pry apart using the pointed end of a needle. Observe for cornplaince with 3.4.5. 4.4.10 Flexibiiity test. Determine flexibility as in method 6621 of FED-STD-141 on

43、 2- by 4-inch sections cut from each of two panels prepared as in 4.4.8. After baking the panels according to the manufacturers recommendation, bake for an additional 48 hours at 220“ f 4“ F. Condition at room temperature for one hour and bend over a 1/8-inch mandrel. Examine for compliance with 3.4

44、.6. 4.4.1 1 Knife test. Perform the knife test as in method 6304 of FED-STD-141 on the flat portion of the panels from the flexibility test. Check for compliance with 3.4.7. 4.4.12 Accelerated weathering. Perform the test on 3- by 6-inch panels cut from two panels prepared as in 4.4.8. After baking

45、as recommended air dry the panels for 24 hours. Expose for 168 hours to accelerated weathering as in method 6152 of FED-STD-141 using a twin arc apparatus. Examine the exposed panels for chalking by rubbing with a piece of velvet or cheesecloth wrapped around the finger. The rubbing shall be done un

46、der moderate pressure by drawing the cloth across the width of the panel in two different locations. Measure the directional reflectance (method 6121) on an unrubbed area of the exposed panel and determine the amount of color change, expressed as lightness index difference (AL), using method 6122 of

47、 FED-STD-141. Check for compliance with 3.4.8. 4.4.13 Salt spray resistance. Prepare two panels as in 4.4.8. Make an X score across the center of the panels and bend through 180“ on a conical mandrel. Expose the panels to salt spray for 168 hours as in method 6061 of FED-STD-141. Face the bend towar

48、d the source of the salt fog with the sharp end facing downward. Immediately upon removal wash the panels gently in running water until free from any visible salt deposits and examine for compliance with 3.4.9. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fr

49、om IHS-,-,-MIL-E-L7603C 0 7777906 OL02b3 T MIL-E-1 9603C 4.4.14 Toxicity. The manufacturer shall certify that the enamel contains no benzene (benzol), methanol, chlorinated compounds or hydrolyzable chlorine derivatives. 5. PREPARATION FOR DELIVERY 5.1 The enamel shall be furnished in lquart or I-gallon multiple friction top containers, in S-gailon lug cover steel pails or in 55gallon steel drums as specified (see